Question: Who was the child of Charlemagne and when were they born?
Paraphrase: Who used to be the child of Charlemagne and when had been they born?
SPARQL (Wikidata): SELECT ?value1 ?obj WHERE { wd:Q3044 p:P40 ?s . ?s ps:P40 ?obj . ?s pq:P569 ?value1 . }